SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f813569b895ed7ce7b76ae9cb860f0250a9293443e7c05981f1f836c07066bc' 
  AND token = 'eY7G6BM/vN4tl1TsC4OTjvg1VxLNNLYyFx+EL/qGX0w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}